Using the C++ API provided by MED requires you to be familiar with some specificities which are not visible to the Python user.

Note: from version 8, all the standard (sequential and parallel) MEDCoupling API lies in a single MEDCoupling namespace. The true parallel functionalities of the MED library are detailed here: Parallelism

The memory management of the various strucutres is eased by the class MCAuto. It acts as an auto pointer and takes care of deleting the memory automatically when going out of scope. See an example usage in Writing fields in a VTK file . Beware however that not all functions return a pointer that should be deleted when going out of scope. Some methods only return an observer to the data, see for example getCoords(). The API documentation of each method indicates whether the caller is responsible of the returned data or not.

For advanced usage, one has to be aware of the stamping mechanism used internally to know whether an instance has been modified or not. This is described in the second page above: Time label in MEDCoupling